Elements of the Periodic Table Flashcards
What defines an element?
elements are made from only one type of atom.
where are all the elements listed?
all the elements are listed in the periodic table.
how was the periodic table constructed.
Mendeleev arranged the elements in order of increasing atomic mass. He also took into account the properties of the elements and their compounds , and arranged them into vertical groups of elements with similar properties
describe differences between some properties of metals and non-
metals.
-Metals are conductive
-Non metals do not conduct, unless it is carbon in the form of graphite.
-Metals are shiny
-Non metals are dull.
how are elements grouped together?
elements are grouped together in terms of their chemical properties.
name the groups of the periodic table
Alkali metals.
Alkaline earth metals.
Rare earth metals.
Crystallogens.
Pnictogens.
Chalcogens.
Halogens.
Noble gases.
give an example of an alkali metal
lithium
give an example of a noble gas
helium
give an example of a halogen
chlorine
give an example of a transition metal
Cobalt
properties of Alkalis
very reactive especially towards H2o
properties of noble gases
Noble gases are stable
properties of halogens
highly reactive
properties of Transition metals
mostly unreactive
naming a compound with -ide
how many elements are in it?
2
lithium nitride
lithium and nitrogen
